Given below are four jumbled sentences. Pick the option that gives their correct order.
A. Its chief feature is that the reader is given the opportunity to play along and engage in the process of deduction.
B. A whodunit is a kind of detective story made famous by Agatha Christie.
C. Thus, along with the protagonist the reader is also involved in solving the case.
D. As the reader goes along he/she takes note of the clues, deduces and tries to identify the criminal before the climax.